Martian

The Martians are a spacefaring alien race native to the planet Mars.

Features
The Martians are 8 foot tall humanoids with four strong arms. Their skin is a darkish tan, with the exception of a wide light-purple band runing from their forehead to their chin. Otherwise the martians are exactly the same as Humans, as they are mammals, have two legs, reproduce similarly, etc. Their culture also developed similarly to Humans; the martians divided themselves into nations and city-states (though not nearly as many as humans).

History
Thousands of years ago, Mars was in danger of having a mass extinction; it's oceans were receading, it was getting colder, and it's magnetic field was breaking down.